% 采样点和权重
pos = [
    1/3,1/3
    0.05961587,0.47014206
    0.47014206,0.05961587
    0.47014206,0.47014206
    0.79742699,0.10128651
    0.10128651,0.79742699
    0.10128651,0.10128651];
coe = [
    0.225...
    0.13239415, 0.13239415, 0.13239415,...
    0.12593918, 0.12593918, 0.12593918];